Item 1

https://backpack.tf/item/7286376597

Sale 1

https://backpack.tf/profiles/76561198808987110#!/compare/1716422400/1716508800

https://backpack.tf/profiles/76561198841279602#!/compare/1716422400/1716508800

Only ref matches

Item 2

https://backpack.tf/item/6450271017

Just qs.store bot transfers

Item 3

https://backpack.tf/item/5491664812

Sale 2

https://backpack.tf/profiles/76561199057187154#!/compare/1713225600/1713312000

https://backpack.tf/profiles/76561199029388345#!/compare/1712880000/1713398400

~11 keys

Sale 3

https://backpack.tf/profiles/76561199029388345#!/compare/1714089600/1714176000

https://backpack.tf/profiles/76561198311498888#!/compare/1714089600/1714176000

Re-dumped to STN

Item 4

https://backpack.tf/item/4682645121

Sale 4

https://backpack.tf/profiles/76561198060609260#!/compare/1716422400/1716508800

https://backpack.tf/profiles/76561198063640894#!/compare/1716422400/1716508800

Bulk for a It's A Secret To Everybody Liquidator's Lid

Sale 5

https://marketplace.tf/items/tf2/30618;5;u3021

$16.49 / $1.68 = ~10 keys

Item 5

https://backpack.tf/item/4478784816

Sale 6

https://backpack.tf/profiles/76561198002824061#!/compare/1715299200/1715385600

https://backpack.tf/profiles/76561199059160806#!/compare/1715299200/1715385600

Dumped for ~9 keys

Then an untraceable sale -> mannco.store

Total Sales

9, 10, 11

https://imgur.com/a/i56oAgB

11 was dumped for less

Given the lower STN seller & the amt of buyer dumps in general I couldn't trace, it should be fine to use the 9 sale and go with 9 - 10 keys c:

Unsolds:

https://backpack.tf/item/5491664812 - ~9.5

https://backpack.tf/item/7255076366 - $16.49

https://backpack.tf/item/6450271017 - ~10.5

https://backpack.tf/item/7286376597 - ~11

https://backpack.tf/item/5284221265 - ~11

https://backpack.tf/item/4790581143 - ~14.5

https://backpack.tf/item/5129663836 - 18

https://backpack.tf/item/4412191961 - $34.99